Imaginary Picture of HD 142 A c

Display orbital revolution of HD 142 A c around the hoststar HD 142 A
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Exoplanet Name : HD 142 A c
Alternate Name : HD 142 c
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 5.3000 (Mjup) 1685.0714 (Mearth)
Semi Major Axis / Orbital Distance Calculated 6.8000 (AU) 6.8000 (AU Est.)
Eccentricity : 0.2100
Orbital Period(Yrs) 16.4403
Orbital Period(Observed/Estimated) 6005.00 (Days Obs.) 6175.29 (Days Est.)
Surface Gravity (G Earth) 16.2733
Star Radiation at Atmospheric Boundary: 28.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 103.2 (K)
Blackbody T 0.3(K) 96.9 (K)
Blackbody T 0.7(K) 78.4 (K)
Tidally Locked Blackbody T 0.1(K) 122.8 (K)
Tidally Locked Blackbody T 0.3(K) 115.3 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 142 A
Alternate Name : HD 142
Star Distance(LY) : 83.9
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 5.9 (GY)
Temperature : 6180 (K)
Spectral type : G1 IV
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.6
Apparent Magnitude: 5.7
Right Ascension(RA) 1.5799
Declination (DEC) -49.0750
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Eggenberger,.; Udry,.; Chauvin,.; Beuzit,.-L.; Lagrange,.-M.; S_gransan,.; Mayor,."
Discovery Paper - Title The impact of stellar duplicity on planet occurrence and properties. I. Observational results of a VLT/NACO search for stellar companions to 130 nearby stars with and without planets
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+142+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%20142%20A%20c/
HD 142 A c
HD 142 A c

  • HD 142 A c is an exoplanet orbiting the star HD 142 A, located about 83.9 light-years (25.7 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star HD 142 A has apparent magnitude of 5.7, with absolute magnitude of 3.6.
  • It is 1.1 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 6180 with its spectral types of G1 IV
  • In this planetary system, the extrasolar planet HD 142 A c orbits around the star HD 142 A every 6005.0 days with its orbital distance of 6.80 AU ( 1017265520.8 km)
  • (Projected orbit of HD 142 A c around its host star HD 142 A)


  • The Star HD 142 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.712 AU ( 106447021.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.984 AU ( 147137601.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.499 AU ( 224205143.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.205 AU ( 329927690.3 km)
  • Radiation at Planetary Boundary of HD 142 A c : 28.61 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 142 A)



  • Kopparapu Recent Venus for Star HD 142 A distance : 0.720 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 142 A distance : 0.911 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 142 A distance : 0.880 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 142 A distance : 0.965 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 142 A distance : 1.594 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 142 A distance : 1.682 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 142 A)



  • Original Kopparapu Recent Venus for Star HD 142 A distance : 0.727 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 142 A distance : 0.935 AU
  • Original Kopparapu Moist Greenhouse for Star HD 142 A distance : 0.962 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 142 A distance : 1.623 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 142 A distance : 1.688 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 142 A)



    (Position in Stellar Map of star HD 142 A and its Exoplanet HD 142 A c)



    (Zoomed position in Stellar Map of star HD 142 A and its Exoplanet HD 142 A c (zoom level 3))

    (Synthetic Spectrum of star HD 142 A*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102